15667

This number is a prime.

Just showing those entries submitted by 'Post': (Click here to show all)

+ 15667 = 1 * 5^6 + 6*7 is the smallest prime of integers n such that by inserting between their digits + or - or * or / or nothing (ie concatenate two digits) you recover n back in a nontrivial way. [Post]

Printed from the PrimePages <primes.utm.edu> © G. L. Honaker and Chris K. Caldwell